Airthrey Castle is a historic building and estate which now forms part of the buildings and grounds of the University of Stirling in central Scotland. It first appears in documents around 1370 and passed through different hands before becoming part of the graham estate and then afterwards to Earl of Hope of Hopetoun House fame.
The present structure was designed by the architect Robert Adam in 1791 although the house and estate were sold soon afterwards to the Abercrombies where it remained until rebought by the Grahams again in 1891. In the twentieth century it was used as a maternity hospital until becoming the heart of the new University of Stirling in 1969.
The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.